What is the primary purpose of performing a soil test before fertilization?

• A. To determine pH and nutrient levels, guiding precise fertilizer rates and amendments.
• B. To determine irrigation timing.
• C. To identify insect pests.
• D. To measure sunlight exposure.

Answer: (A)

Knowing the soil’s pH and nutrient levels before fertilizing lets you tailor the fertilizer amount and any needed soil amendments precisely. A soil test shows which nutrients are already present, which are lacking, and whether the pH is in the right range for nutrient availability. With that information, you can adjust fertilizer rates to match crop needs, apply lime or sulfur to correct pH if necessary, and select the appropriate fertilizer formulation. This targeted approach reduces wasted products, saves money, and helps protect the environment by minimizing nutrient runoff. Irrigation timing, pest identification, and sunlight exposure aren’t the points a soil test addresses for guiding fertilization.